POSSIBLE CAUSES
1. Gaskets and O-Rings.
(a) Misaligned or damaged.
(b) Loose fasteners, broken or porous metal parts.
2. Crankshaft rear seal
3. Crankshaft sear flange.
Scratched, nicked or grooved.
4. Oil pan flange cracked.
5. Front cover seal, damaged or misaligned.
6. Scratched or damaged vibration damper hub.
7. Crankshaft Rear Flange Microporosity
CORRECTION
1. Replace as necessary.
(a) Replace as necessary.
(b) Tighten fasteners, Repair or replace metal parts.
2. Replace as necessary.
3. Polish or replace crankshaft.
4. Replace oil pan.
5. Replace seal.
6. Polish or replace damper.
7. Replace Crankshaft